<!DOCTYPE html>
<script>
  if (window.testRunner) {
    testRunner.zoomPageIn();
    testRunner.zoomPageIn();
  }
</script>
<style>
    body {
        background: green;
    }
</style>
<p>
    This page should have 144% full page zoom, hence the viewport width should
    be 800 / 1.44 = 555.6px, which is less than 700 so the background should
    go green.
</p> 
